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1 // Copyright (c) 1996-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #include <stdlib.h> |
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17 #include <string.h> |
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18 #include <e32std.h> |
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19 #include <e32std_private.h> |
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20 #include "h_utl.h" |
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21 #include "pe_file.h" |
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22 |
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23 TInt E32ImageFile_PE::CopyImportAddrTable(char *aPtr, PEFile &aPeFile) |
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24 // |
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25 // Copy the import address table entries |
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26 // |
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27 { |
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28 |
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29 TUint *ptr=(TUint *)aPtr; |
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30 char *importsection=aPeFile.iSectionData[KImportSection]; |
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31 TUint *src=(TUint *)importsection; |
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32 while (*src) |
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33 { |
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34 TUint vaoffset=src[4]; |
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35 if (!gLittleEndian) ByteSwap(vaoffset); |
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36 TUint offset=vaoffset-aPeFile.iSectionHeader[KImportSection]->VirtualAddress; // find the offset into the section of import addr table |
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37 vaoffset=src[3]; |
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38 if (!gLittleEndian) ByteSwap(vaoffset); |
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39 TUint exportername=vaoffset-aPeFile.iSectionHeader[KImportSection]->VirtualAddress; |
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40 TUint *p=(TUint *)(importsection+offset); |
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41 while (*p) |
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42 { |
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43 if ((*p&0x80000000)==0) |
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44 { |
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45 Print(EError, "%s exporting symbol by name\n", importsection+exportername); |
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46 return KErrGeneral; |
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47 } |
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48 *ptr++=(*p++)&0x7fffffff; // mask out the high bit (- indicates export by ordinal) |
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49 } |
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50 src+=5; |
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51 } |
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52 *ptr++=0; |
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53 return KErrNone; |
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54 } |
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55 |
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56 extern char* gX86imp; |
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57 extern int gX86num_imports; |
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58 extern int gX86num_imp_dlls; |
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59 extern int gX86imp_size; |
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60 int* gX86imp_relocs=NULL; |
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61 |
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62 TInt CrunchImportSection(TAny* aSection, TInt aNumImpDlls, TInt aNumImports) |
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63 { |
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64 // Remove lists of ordinals from import section |
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65 TInt* d = (TInt*)aSection; |
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66 TInt orig_size = *d; |
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67 TInt offset_correction = aNumImports*sizeof(TUint); |
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68 *d -= offset_correction; // reduce total section size |
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69 TInt *dd = d+1; |
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70 TInt *ss = d+1; |
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71 |
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72 TInt i; |
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73 for (i=0; i<aNumImpDlls; ++i) |
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74 { |
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75 *dd++ = *ss++ - offset_correction; // copy name offset and reduce it appropriately |
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76 TInt nimp = *ss++; // number of imports from this DLL |
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77 *dd++ = nimp; // copy it |
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78 ss += nimp; // skip the ordinals in the original list |
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79 } |
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80 TInt used_size = (ss - d) * sizeof(TInt); |
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81 memcpy(dd, ss, orig_size - used_size); // copy name strings |
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82 |
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83 return *d; // return new total section size |
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84 } |
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85 |
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86 char *E32ImageFile_PE::CreateImportSection(const PEFile &aPeFile, TInt &aSize) |
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87 // |
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88 // Create a new format import section |
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89 // |
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90 { |
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91 |
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92 int total_imports = 0; |
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93 if (gX86imp) |
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94 { |
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95 TUint *rdata=(TUint*)aPeFile.iSectionData[KConstSection]; |
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96 TInt bytecount=gX86imp_size; |
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97 char* section=new char[bytecount]; |
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98 memcpy(section,gX86imp,bytecount); |
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99 int i; |
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100 int j=0; |
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101 int* s=(int*)section; |
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102 s++; |
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103 gX86imp_relocs=new int[gX86num_imports+gX86num_imp_dlls]; |
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104 for (i=0; i<gX86num_imp_dlls; ++i) |
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105 { |
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106 ++s; |
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107 int n=*s++; |
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108 total_imports += n; |
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109 while (n--) |
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110 { |
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111 int rdata_int_offset=*s>>2; |
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112 *s=rdata[rdata_int_offset]&0x7fffffffu; // rdata offset to ordinal |
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113 gX86imp_relocs[rdata_int_offset]=j<<2; |
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114 ++j; |
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115 ++s; |
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116 } |
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117 } |
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118 *(TInt*)section = bytecount; |
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119 aSize = CrunchImportSection(section, gX86num_imp_dlls, total_imports); |
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120 return section; |
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121 } |
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122 PIMAGE_SECTION_HEADER aHeader=aPeFile.iSectionHeader[KImportSection]; |
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123 TUint *aSrc=(TUint *)aPeFile.iSectionData[KImportSection]; |
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124 |
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125 TInt nimportdlls=aPeFile.NumberOfImportDlls(); |
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126 if (nimportdlls==0) |
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127 { |
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128 aSize=0; |
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129 return NULL; |
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130 } |
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131 E32ImportBlock *block=new E32ImportBlock [nimportdlls]; |
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132 char **name=new char* [nimportdlls]; |
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133 TUint **import=new TUint* [nimportdlls]; |
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134 |
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135 TInt bytecount=sizeof(E32ImportSection)+sizeof(E32ImportBlock)*nimportdlls; |
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136 TUint *src=aSrc; |
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137 TInt i; |
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138 for (i=0; i<nimportdlls; i++) |
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139 { |
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140 TUint vaoffset=src[4]; |
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141 if (!gLittleEndian) ByteSwap(vaoffset); |
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142 TUint offset=vaoffset-aHeader->VirtualAddress; // find the offset into the section of import addr table |
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143 TUint *p=aSrc+offset/4; |
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144 block[i].iNumberOfImports=0; |
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145 while (*p++) |
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146 block[i].iNumberOfImports++; |
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147 total_imports += block[i].iNumberOfImports; |
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148 import[i]=new TUint [block[i].iNumberOfImports]; |
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149 TInt j; |
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150 p=aSrc+offset/4; |
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151 for (j=0; j<block[i].iNumberOfImports; j++) |
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152 { |
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153 import[i][j]=(*p++)&0x7fffffffu; |
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154 bytecount+=4; |
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155 } |
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156 // name |
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157 vaoffset=src[3]; |
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158 if (!gLittleEndian) ByteSwap(vaoffset); |
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159 offset=vaoffset-aHeader->VirtualAddress; |
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160 name[i]=((char *)aSrc)+offset; |
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161 bytecount+=strlen(name[i])+1; |
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162 src+=5; |
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163 } |
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164 |
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165 bytecount=ALIGN4(bytecount); |
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166 char *section=new char [bytecount]; |
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167 char *s=section+sizeof(E32ImportSection); |
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168 for (i=0; i<nimportdlls; i++) |
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169 { |
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170 memcpy(s, (char *)&block[i], sizeof(E32ImportBlock)); |
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171 s+=sizeof(E32ImportBlock); |
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172 memcpy(s, (char *)import[i], block[i].iNumberOfImports*4); |
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173 s+=block[i].iNumberOfImports*4; |
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174 } |
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175 char *t=section+sizeof(E32ImportSection); |
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176 for (i=0; i<nimportdlls; i++) |
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177 { |
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178 ((E32ImportBlock *)t)->iOffsetOfDllName=s-section; |
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179 strcpy(s, name[i]); |
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180 s+=strlen(name[i])+1; |
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181 t += ((E32ImportBlock *)t)->iNumberOfImports * sizeof(TUint) + sizeof(E32ImportBlock); |
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182 } |
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183 while ((s-section)<bytecount) |
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184 *s++=0; |
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185 |
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186 // free mem |
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187 for (i=0; i<nimportdlls; i++) |
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188 delete import[i]; |
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189 delete block; |
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190 delete import; |
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191 delete name; |
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192 |
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193 *(TInt*)section = bytecount; |
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194 aSize = CrunchImportSection(section, nimportdlls, total_imports); |
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195 return section; |
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196 } |
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197 |
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198 TUint E32ImageFile_PE::FixImportThunk(PEFile &aPeFile, TUint va) |
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199 // |
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200 // Fix an access to the import address table |
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201 // |
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202 { |
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203 |
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204 TUint *imports=(TUint *)aPeFile.iSectionData[KImportSection]; |
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205 TUint n=0; |
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206 TUint importoffset=imports[4]; |
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207 if (!gLittleEndian) ByteSwap(importoffset); |
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208 TUint iat=importoffset-aPeFile.iSectionHeader[KImportSection]->VirtualAddress; |
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209 |
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210 while (iat<va) |
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211 { |
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212 if (*((TUint *)(aPeFile.iSectionData[KImportSection]+iat))==0) |
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213 { |
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214 imports+=5; |
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215 importoffset=imports[4]; |
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216 if (!gLittleEndian) ByteSwap(importoffset); |
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217 iat=importoffset-aPeFile.iSectionHeader[KImportSection]->VirtualAddress; |
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218 } |
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219 else |
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220 { |
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221 n++; |
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222 iat+=4; |
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223 } |
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224 } |
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225 |
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226 // Flag errors brought about by a corrupt input binary |
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227 if (iat>va) |
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228 { |
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229 Print(EError, "%s is corrupt - problem processing import address table.\n", this->iFileName); |
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230 return (TUint)KErrGeneral; |
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231 } |
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232 |
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233 return iHdr->iTextSize+n*sizeof(TUint); |
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234 } |
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235 |